Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70c7e033f408007858d175b17f007fac2500bf41ad7455ee1c75c9886208236a' 
  AND token = 'Dn3737JcRPmPX6mlJqOfAvYA3TBFzNlLFLWEyvPVjmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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