SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba5b5c9d8367417f91f76159d33b868c857bbda9a5b8e1c60bdbf5761e1428ca' 
  AND token = '95ha3I40XUeecAben9ntmzUFitGW/hJKxAqBdbFFMpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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