Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acc18f04ff6afdebeab56002524a108b247f2f1ae1231f73d9bb8443cb924df9' 
  AND token = 'WITJnW8KkAiQK+rngalg2hrxr6TK/OoYTkNWeP3bUVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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