Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78f089bde57fdc5ee735de98c4f8ad18eebfa9797e644667c15f694cde8a52f9' 
  AND token = '02jMhpMbAToCQ4xag3SKCpDH3ojHbGWk8PJ30FZoojs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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