Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eb92538030b7574a9bb98f6834f0f1d691b5d7040046b8c2009fe34ba4a0157' 
  AND token = 'cvC81oJFt4pTmkuf62JmM4KK3pkJxNvm2oJxRznWLyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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