Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f8d6217e4d58f6bcbb64411fa92bad447c29ce702f6e718e8ed58cfd42fa7cf' 
  AND token = 'dvTDPEBazIJIwVf0Wzk2A4jqqUQElSmTtL4nqYXRuW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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