Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a525999149edb4d39cfd373a037650d802bc6588ac57ef19350961b02e8ce046' 
  AND token = 'tysVvqLI13IcfmRrzVJXuKan/7U9vtk+BiOykq2fccA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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