Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99abb43041e8fb532cf82c60019e1517af9022e88d089f6d31501baa2f7ebf2e' 
  AND token = 'bWsXnkHym4lnegPnhjFN3qycBneiq9nzn8q3aZefP6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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