Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f4f68aad70cc116e45e11bb04642402ba695f5adc20cfe72c228eef428e2f6e' 
  AND token = '+oYmcLsbm5QrgVsrG21nJt5JoyFarTeSD7uVxDMYtzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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