Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '125544a468b5488bdf02d81e75dd2f0d6d9dceeb450e1d72180c3f0a16f71521' 
  AND token = 'I99H1MtCeaJQRj4+QSBIiReOwFUQyQs6FhENXuSFag8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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