Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4539d792db5c14e3bad07e3c5eaffd2664621ebb00f77bd1c874cb6d8e6406d8' 
  AND token = 'YccKOmUMZ1MWGh3SQtHlMgYIborwp6GbCuVghEO83xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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