Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb76aeb606e6b734a33b20811a1e583883bdd52a5afe20061824f4becc4e5bf1' 
  AND token = 'OyrflT3IK5fz4r/MgtRaa79V01fkuiY28Enz+OxtNvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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