Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9184736a13cabbd738eba63e3c6e258a67c98a9f94cc587eee77451344544a4' 
  AND token = 'scH4EeBgN5cou8Hx4anM8Gs/r16maLLZSd8swT/hgSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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