Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac5d8cc5649a63f9b74520e0dc6d50f7b71cb6cadcdb94e491090f2b1cd8b188' 
  AND token = 'FghPaisYFshb/yV3L5QHFgfHEoN8wX1HAtXkEheDDkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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