Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1d0f73284580d1de4edac926e0e4abbc24cf66b0bd49bff0c7caba397b7c4f54' 
  AND token = 'uTnkYZ53xPCis20ZbkZ7Dgjw80bOx0wkXQgfYHmIZKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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