Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9daaf6c96683599208a91f7d7c9ed21960b8c814cae2aded142352cbbc843a0' 
  AND token = 'fIJcfdEjbRV0OKZDB5auExZk3RqVbANyUR7PCxSawSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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