Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '943c279fccd9ddfdc65497f57861d68d45f9e1c3c36b6877f1cbd55f1641153f' 
  AND token = 'n4Ut81fjrtD14WgrXann/WDmWsEmbofF7wQMH7jtNCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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