Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '069bf6b9c2e33835d63b7435e6fd493161b870fdecc6e6e5de21f75b6dbd7869' 
  AND token = 'q4J16it+q2FpSL99ctWxx2/QOkAR299l3FYsVqz0kmw=' 
  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"
    }
  }
}