Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b1d8231b038e6fe720845861ba30e4c1a5d7d82b4814c61a2c47b080f08a4e1' 
  AND token = 'agdep1T9Q+ZXKPssTBoXzTLeb9fhNe7o+v9dhdIxxak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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