Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e592331b93a207e45550f0a7f74ee42f0c2a76b714c9b6fa36b1d747e349548f' 
  AND token = 'r1Sj03IEEh9r/hRQvIuuHRE9qc6lBVovyfNttUtf2NQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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