Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a800a340ae9b11cec78a09a3593d5d68cbdb2c3f5ca3ee8ad609e5fd8c6a098' 
  AND token = 'xicTocdlqhJD/bzzwU/vepSB5FIsG/EsqG6qsZCLUZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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