SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72c56e018fdf63f69a6644c57610e88caa34427f59e21b25ffca5b9dade196b6' 
  AND token = 'tM/89QKrZZ78ummU4hav5jaYzR749O0O/cmrOgPmzh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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