Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a073bd8af1ba50ae25b84ca0d94a63d480301e80aa45115617080915d8637a46' 
  AND token = 'Ttz0P4dleSz13y+l3c7qgps11oykl4SvdV5S4XpXvW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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