Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a255df405f40e98d029ef2845b5413a9f954e0ac37ad1bfa25b77e667e530678' 
  AND token = 'K7OgWirPVlM2yZ86jNu99xeUHarRDXB6B5qn3iZOMu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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