Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf35cdf40e2dda9430d1bf9ecde817bc9902d326e241070d0faea917b787d988' 
  AND token = '7Auo6AecWflTaU0hTndHlGBom6pU6s0ctD+jAqvX4a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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