Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e295f4fbde9ed8e70c8871cd8528681c38fcfb7ba89eda9c191f3b3df7f066e' 
  AND token = 'h1AQ9Bhk2voRpl7htQbihgh+K1YqbHWiPWXaqLYckhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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