Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aba4c539ad980c4fa743b512b34d4a7db57764e2c0af59eca6e5013799d2a557' 
  AND token = '52TJmdZjmhLA3JeYbhLpSPuEP5hlQ2YeVPSDh5dWNqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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