Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '7ed78a20c974cb2b43c47377a3b3380c0d2e425481006a83e11ae576437ffb5d' 
  AND token = '/kkpIthi1nP32HVmwBSTGrP9m7bCyyNsH40Zyu+5W5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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