Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c87f0f32f1be6b08b042b5d63043a307d9b6ebe3321dc2f011ff9bfb2c44e665' 
  AND token = 'pWrquq6x9JAGObt0YZzinGeNHI4nVyui4Prw4kOz48I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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