Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6be5887679f7febcb0ab72e56caa29787b04bb81d5943189f93c13fb23f4f368' 
  AND token = 'VofHuO42/vNdwTbXgK1jeTy7Tsd8CisUmIKXYrqFyCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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