Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b419fffd18726ccc16797afd91e18035988ace934beeb83846a32a8633be4c2' 
  AND token = 'QTJTQ60dKci2/RvDmLUcZwebXLHi4SJzPtIM0udFv54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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