Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9821e6956448ad0105bca38e0829c3f61835b791a891a519d016a0e23ff760b0' 
  AND token = 'k2ccDw2aQoi98KJIpN4Mftn4EUCXFT+qjw6hpRw+RGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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