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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e72d28b4d14f169524c08c0008113ca012a1f7a7f8efa692a250469e454ed09' 
  AND token = 'owFwc+kj9Y0F1qY4sJDyia2yWJ91aTdD60dZMIdrIFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}