Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df39d686859f0729939a838acd9c7bca11ac831a5cc8fdf0a9d2690bfd06bc40' 
  AND token = 'U0TuFr74u2HB+9THf91t3g9cjdCwMfJOmj9pT6kTNok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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