Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '023cdb036279a08275d18c1c09bf2517bd68944210257067ce11b4e7bdc814f8' 
  AND token = 'R81+QPEjAAWzkQUYW9GrKK6cWdgHLUuoFeSVzKF+GlU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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