Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '159a034ff7b670dcf7651b0575127d42be3d0520a28475e7f5370358948fd56c' 
  AND token = 'pGFvdn6FJEK9oDn4D7URQVYkytqgA7vKp/m7bjW1M8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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