Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5cfbc5e597d9e3e94770e7fb9c636c2351ae00a7f245e5bb1649dcabe13a962' 
  AND token = 'Kc4SNfMNh6ofUJxbUY+MUSyC6da6PRjmLNoHraC4vqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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