Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a76986f4f4282683cd8a4be2f0054771c14e371153fff02bee7fe9a0104440e' 
  AND token = 'akdd59ORCoHfkmOCoVmE2/gaoMRfOTbGyDZTXLyxCx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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