Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '771f5b76dbc0b2ca2c27c179b2b35143c2348968ec03f458b6a6d707dde8cb65' 
  AND token = 'V+566qIfiX3p82Ogp1zte0bLvRZ0uyaiIgmHjB+8pGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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