Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd4bfe4bc0d7c539d338374eb38e0a83cd0302ce5a130d8e895ad56207304104' 
  AND token = 'TV8ANIPbKLwVwPkHxslkunqSpCqclgrD2k0i3tDRxDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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