Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd093b13deaee4aefe66cce83fb154990271b69961b13c555f90ecb45b2f31ddd' 
  AND token = 'PNs32xGBnCtGOku2DQIRCSMW7UTcG+tKjzDgrPLmdnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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