Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd664735b6284126457714fea7b2ea6c35e132abdd70090ad1367a1dd551d4fc5' 
  AND token = 'CdS/FRAlWrhdgh5ktnWLZlu2pQFZbTmuZh0Pf7SxIK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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