Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a3d87286dc2ec32735efd312de00c22938b7140c27ddd526ef184e653dad25c' 
  AND token = 'V+Y9QJyp8CUv2JFPUaejRyO5F3B23+JqGN7MsaxvF6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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