Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ab4c40fc1b8c9a1b5ed6212a5f22c6627bc56885c30cbba051f172a384c093d' 
  AND token = 'QAWKFlYZ3///yLzcku4Q1UDcBahx59cl2BGKcoG2Uro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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