Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f828914e8df7b18ac303b9883c83a7668ce09aacc2a51e9e065fc5d9e5629f92' 
  AND token = 'xCTf2A+3VHUVoH0IMG8MJnM3eOaztoq77yVygUr1Y14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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