Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '333059f45f9588510661520a6506046cdfcb992e5dcf3e7f9444dc8303e1d611' 
  AND token = '2lB7awxTGJFMt0sZI5fOZc2y5MrCxamm1bUDhEamjnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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