Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '913c1aa8ff6696255d5c0b178ad5ec1970e3972039aec3f93d84c6d934e346de' 
  AND token = 'id8gB8aXY+ifYWlsrNnt7rFgWp7FLGPG/q02pfi2HuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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