Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5b2f19e38b2a60ae82d6cf01e9672baeeb15395e671cc00e997881e3336527f' 
  AND token = 'QohML5zdr56i1Wl/k9HsnzVZ08NVIbYUX4D6OZcF/WI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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