Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fcb2865ed9e2baa503cd441cb3255ca98f785aee32518f4547677e645f7b9c6' 
  AND token = 'yQLECSoAbYs5NEenl7iJEpHRxaAnHOgKN4SAsURABAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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