Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd99c9907574b485b3a34f2a942d57f5ebdcb01817c938b71a08c6c616e112760' 
  AND token = 'QiN85eYuGikY84TgrQVl7Y+eKpC/Nl9/bwoq2h6yHg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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