Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0620705de03fe280e23e5eb43531ad9b2d718a88cbbbdedca36bcb021aae486a' 
  AND token = '7V/KmlTwnwpR5Iv4ozChceNanknik5kU4W2CAFlyo7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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