Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '56078f2f4e5eadaca00e9c39ee57fc4a9f1192f917d96f965fb6cf2670c8cb05' 
  AND token = '1EBVpYEZrvet1asj9UOqv2IkJRqMu0mQ6wMFuMluQM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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