Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d50f7da2ee68f38c2cb2e8462066ce2086599df70a6669f8f28c0163fc24c04' 
  AND token = 'oEZyJm/6ESNkaUgqHt1R/Qw8RigyeHDNL4EIC0laTDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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