Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8819b5e83e7c9a79f14d6e95078a81486d1d285f5a0f1eb9c50659969c8b947a' 
  AND token = 'XvfOpJiMWAKP8LnTytpkm/1OYeym71n+1rDA16HyLx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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