SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65af605f4a005ff832ee1976e3a062c940d91c996c01b8ab90a32f9a7b2f4235' 
  AND token = 'utQRKwoLGILz6K47twADFU+GuJV1C3v+xPKNmQRQfck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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