Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0313b5697633efcf746b43148835c22923af606bea8e0033aa1ef3dd374027f' 
  AND token = 'VyQH7sXKnoFcvrJE+G8IC0KEqxFDqsSDEwTGxEFe8Lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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