Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46c98f4e9a4e780c0fafddbac7162060f5421c404ceee02a7e64bedd403f3cf5' 
  AND token = '3WWtfKV3N6EBXsY3KoDq9t9UC6AkeuO2Asg9HeU9AHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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