Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8d7969066950076c28cb0af09695bf21f50f92fe5c5782296330e0e1d4b23e7' 
  AND token = 'ty2lB0pH9qWcsiQvHUWEGPwWwq5BnUSB1DblTX+wGxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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