Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '111c5ef990ecd78d26633528332ab3d6856317b006fbd562886ebe2e3f1d06a4' 
  AND token = 'OHTjtMh37kie/y18rwBDyEYmFxku+eAZZRSpf1/7hP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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