Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99e0894cb9f2fb848c0e27d1e4b71b96236197cd1bf2e110b8f61be328ce5d55' 
  AND token = 'NHGVPklQHt9xPDh+9quskv1GVTL+RcfPaT3PSpY6mu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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