Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '735669f2b887baf58e6b4308466e553a61cbb884ad560267bc83d5b991f35933' 
  AND token = '7IiSI0hCPfGHQ+PzaeIYutQSOjk7ngHvyyyQ3AxSXCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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