Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8f04491810ed56e324ed10fdfa45b10f06816150d29ba8e6b6abab5a04efef6' 
  AND token = 't+j1ICE7XPJqzgH3T3c4bIqy5uGx8xro6ksVDu3TuqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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