Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '426f55ee40096788ecef6add3ec1bd9116ce336aeb86427a2f08eaed6077603c' 
  AND token = 'gG1O0iejQTsdw2Hk6EMYOryEyBbQm4JOrJ76liWoJhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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