Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0450c13cbf2d8a9318c84a83b8a389c8784b936c35021e3dc1da27d94f8c3c3c' 
  AND token = 'f2Pnm12k8g6hwxIw5eD0wGMgyh9XtZMkD3EsGE5U1l8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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