Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa298a9486ea2bcc2d8c77368cd06709f41c2739d80b0dcb97f5405ea40ca94f' 
  AND token = 'OfFxoWTWLB11l1oeljhBDv/5KoLuGOXPWzP+p076AfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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