SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'ff769447a6f4ebf7ad6d973441101dd1d6b46848281ad41dc0625c83f0ea971a' 
  AND token = 'DCq3TYTVu/OShLdUcG+OOPQBGfosahQ1PHnN3HgVRNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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