Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9ab53ec225cd0c89dde3ed0894bbb9b18da7d64415b0fc6b5ec08d48aa96435' 
  AND token = '3Tj9A+TaaCWEFE9gHWU/fLA7F0UdxnKer7f36iw1Q8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}