Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e607d4ef741e92fd26ff14ed89d8ab40cff06c0f32eee1a9d78e3fe048b55541' 
  AND token = 'lsfTTCjeoGeKCCb/O1oziCGXICBWCkJNbm2xFWGQ1FA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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