Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a4fc0be4124e577e988c195fe27e51fadbfc7054a5ee549f1045733b46254fc' 
  AND token = '+Z9m4VdB6Yeqn6j92iUo2CE1HTbMRZn2hAumSqRDsTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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