Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4045668083896e352da5b1139ca64036b614760f1efa1e9dd23f3b34a85482d' 
  AND token = 'eiKWjAIUOesiIARPRBHWkA8BtX2Q9VUzXw3pen80/bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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