SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dce1329387b2d57b9a56b58501b0498b757f60d532e06938756f0634f2346671' 
  AND token = 'TFBsDKgQid7YVWimewJSUzi0Vk9lKmCZo0c/LrC2INI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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