Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb1df82ff6eb7f9ba307d74ebb828538ca23067ebc828f2c78a6560de1b61489' 
  AND token = 'nzs116N7wpQwHlFVMiLGNNNMmwqXLXGFQ7dQBNsepfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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