Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64aaf2ba8d02e130b1152e78f11e0f456c6dff6ebf978cb95d1e16726f282cd3' 
  AND token = 'kikcTNKmahbjXT+Kqhc9MrV07sChtQaHyQrFBJicB6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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