SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cb4f53682d279332f5d375810c1bd82c1055d7642596510c4175c816d2e0e07' 
  AND token = 'VfrTj+vGL4z7botM/VhzP3fz/Kam45MrGuKgkezDPyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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