SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69b0fa4f2188a7b4d66cc393202105a1d749c6bd99136714f66c0a805d82640c' 
  AND token = 'vWFENQc4HwbJ2VP3lWGcgdxXs8eMviQUDCI5oFA+K/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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