Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b89eda11ccfa63ff2caa20265a6b65e34fc6536ebb14e6b399015fc746e891a' 
  AND token = '6l619zjDqPWPRgZ50rF5clNX3OUlaSw5b6Md3j0xD9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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