Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bb76d79c8bcbd049d065cb701a5cd43d55c84229444bb1c8bdf0360b4702d76' 
  AND token = 'gpW87kUPp/BAKRpCZ5WZfr7pteRLrLP4NiH9RCw4+Yc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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