Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34a26b57d83fa5410a4a572eaeca5665fb0e8157992ea6b0cf814fd57d348663' 
  AND token = 'mycjYX5R9hxwq6VXvx4qM7ZVP3RaY96uk2sN/jm6vEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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