Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f4ad57e63127e7fd4eb01fb63f12973860302e65c24c2032648057bf6eb4ab0' 
  AND token = 'gUl60/8WbQnGA1NoDdRe1AZ7i79OAWchzom8j3aHfm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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