Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c15da47dcc07b03cf6d7db1b4d720475ff59561fc0353b3ae00da6d99597e49e' 
  AND token = 'PWWb+1UWADKnvEU3tkX4Lg+GlUeNXOgSafPXrkpYnpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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