Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67fcdb37af8fc3d8ba730680f2d1d9f6824707ea2c916b48487bd418f38bdcfd' 
  AND token = 'FdqCUfn7zzWXS4WjmUKfNPFQ+DGYetwuMN0LMrUKfdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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