Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cd37508f5710f9cb82bb292c4f0f4df2c07e11bd9b7b73bc3df8d252131d839' 
  AND token = 'hhY0+o7GELU6mQMivyoxCjq0k9PDThoHUvoRqbyGsVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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