Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc516c505caa0a4d0269829e8724756b4d311d9fc63835ba24dff0f09c33cd68' 
  AND token = '3etLfOuSwi0D70qrMdsn1abO11fC1K1ZpTGLM8jKuKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}