Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'a628c0001c47fe75d3d9023c94039410d131c3b090035c62b0f1ec6090abc24f' 
  AND token = 'bq2+sHHw7z1/ws9g727wzZBswpeBcZA+sqxTH0EBajs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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