Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0689ed15618d277e8bf95ec919d476596b1eb12add9b160b98cfed95f1de96be' 
  AND token = 'g+Ra2dBVtUqIEI4PrG2ijRMpw0VtqJCftUvCo3ilYlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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