Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c464143d3067696d00ebb4c2e70c62f34a7431dd573069445251957232775e01' 
  AND token = 'x2wpLdHmh+jS3BJJ63v+PrlLqwjq3TwpTB6Bi1e3hB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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