Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2d8233060cbfd0738f8058fdb5ba051783fc25769c1b48b34e6ad037717b122c' 
  AND token = 'dc/MLrB7ZQsr3d16IgMwWsGZLuzjHwu0n2NTDixcwIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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