Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55437b1a90d6ad9e195afa85eff770615b19ab3c13faa6e588094307eef7f030' 
  AND token = 'jylQuKKHlH1X7twEYrTQdvXtWA1ukcASJLYRrdFLj1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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