SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96293692d1ab5ad09710fe1e58b6fa9384986e63ac4931bfc75941c856a8402d' 
  AND token = 'rmwVl5IquKQ0kuljVpZ/vodtRbbh3gdvab543l5UDU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}