Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a70139abc5c02d061425e4ac2f35f79309bbb3e792af393290d06f2aead941d4' 
  AND token = 'm6MDq6Tmnj9FpyG4hd6qik3h+mRmpV2di/kTBijyJYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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