Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3b555d3b01f6c7bb026d33441ba788e5e0da9b513786b3d43bcba1eff603265' 
  AND token = 'zEWC3P98aGqLoEUCK6Fw+WOKrgBCN/L6N/dA2UCXUm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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