Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '069c145c297e4f43c4dff4e3838ee0993327872670d0eff585d688cec214ed5a' 
  AND token = 'lXQYC1DMp3BJy4ZAimrli4T3C5gR5iT65q6kAQowZ10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}