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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ae11aaab2122e97a8f55ac0a774e83662aae5f055591614bb977a5e5f90c888' 
  AND token = 'ZVHgp4C7pCsboigXFlur2sWUE1cmIgY1TFctVMSZKa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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