SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95f4a55e365a85ab9f89a66b0dd879ad8e3542ed67fc321d0ba6061638a9241e' 
  AND token = 'YB68PzZVIKkYskAG+cflZo/7I2+U4tqGx1x3kvkIuRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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