SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fe2d594d1b3361ec0e95a7c60ba7a1ee7265fc35e4d11b9cfdcf67e83c48264' 
  AND token = 'RYvV9hLqd0lAZjm2QRSyvz2aYXHKSjX5zXV+9heSTPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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