Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6fc1226acbd191282fffdc9b2f53e70784bb574c6ff04c0baa4cdad420c12fd' 
  AND token = 'IzLW/lCESoSXEqnSb4JcDw7r7GRbm8M96O+8hmnno78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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