Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5085066c8a0198c547ee0bd50e2c7986ddf9cb3c4a1dbaacd30740d7fc843a6' 
  AND token = 'i+zr/flU+BAGkbaO95gFFj6zRUM5QNTAOvkEXe8E/yk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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