Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e87ee1b4ac292b639d6248bd539c928718b68088db89db61a6e9e7361735b599' 
  AND token = 'Qpzm8Cs+1/FUAHodQZrnnbyxBBHbTOfoCarjp4u6dHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}