Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '907df5011e045dce88ce75d01748a7a43774cd017a6011a1e08050e9acc41cf6' 
  AND token = 'LVGxMz7ZzsdohZQyv/QDYAIJ6XvuMeqHWHcQ4PgWIV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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