SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82c5fadfee2fef6557ede4176dd64b6020c1f3419dcacaba8dc237164867475b' 
  AND token = 'VmaTPbv1YHxKvfQFuZxC+pgk/8U7qhj1Qb+PAwWTlRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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