Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fe04d8b78f4492c6dbbce9e35100f4c946bf773a0266cdb4aaddc8cb5d80c23' 
  AND token = 'NzraZeYmCfz6Es3y77Rnk1pbhBusPMughAE2qaSLPg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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