Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79b782fce55852ce807343d33f7613318c735415db1238661d3871a1ca432121' 
  AND token = 'eXuVeuzUehRCQI1enYxXX8mJxWAEVDsxyNsSM0eU/lc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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