Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b424e04dbab81e2e8dd4298c45020e9609edf6171b595b4d31f5d9ecaa8417f6' 
  AND token = 'IL7lJiqf0hcM75rzZsd/4fQecAWDcju6wyundFegmPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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