Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ad82929b95ebeeaaf820ef647da4f47ea3db2c99dea666e9fa351c1dbdfbb72' 
  AND token = 'cvdEhwYkFXElUttvEpI4Aj20vei5Fl8lrbQo86k/LHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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