Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '141ed3e0698544eaad83e90f19da538858bf18ffdfb517aabb3b0ea55347c2e1' 
  AND token = 'Oj0zTtIodnfRU+8oyZGfouWyZmeWoVv2QEy/FuSdKok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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