Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd821cf4767ee70877bda81612954325a09c2ae1db745e9a3ad1af00ee9364dcd' 
  AND token = 'mDMu9U68yy1LguSp7K3SitAx3Ek9aJTZNtVes2HpRcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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