Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cddcbfd2d1573d2ec97c3abd0a108203fa8f1abf2fe1c84f9ad73224fd53ac8b' 
  AND token = 'nOJNBZJgg4dZHp+wAyDdJj5C+xXniNP1HE3D7U8TI3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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