Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b02223a923c12e709491a5c1c725af1a519518ace46e61a242eb1f9870eefb7a' 
  AND token = 'vtJxDY+tLH5DxhzRM+L4qjngWjS4tgW7f9k2/e6uXm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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